Why Perimenopause and Menopause Often Bring Weight Gain and What You Can Do About It

by Katie Sorensen, NP | Owner, Weight Loss NP

Why Perimenopause and Menopause Often Bring Weight Gain and What You Can Do About It

Hormonal Shifts: What’s Really Happening

As women move through perimenopause and into menopause, the levels of key hormones, especially estrogen and progesterone, undergo significant change. These fluctuations are more than just about hot flashes or mood swings; they impact how your body stores fat, builds or loses muscle, and handles insulin and blood sugar.

• Estrogen decline and fat storage: Before menopause, higher estrogen helps regulate fat distribution, often favoring hips and thighs (a “gynoid” pattern). When estrogen falls, fat tends to shift to the abdomen (an “android” pattern) and visceral fat (fat around internal organs) increases, which is more metabolically harmful. (mdpi.com)
• Muscle (lean mass) loss: Women in the menopausal transition also tend to lose more skeletal muscle mass (sarcopenia) than before. Since muscle burns more calories at rest than fat, this lowers resting metabolic rate and makes it harder to maintain or lose weight.
• Insulin resistance and blood sugar changes: Estrogen plays a role in insulin sensitivity (how well your cells respond to insulin). With lower estrogen, insulin resistance tends to increase, meaning more insulin is needed to get sugar into cells, more sugar remains in the bloodstream, and more of that excess can be stored as fat. (menopausenetwork.org)

How These Changes Drive Weight Gain and Why Losing Weight Gets Tougher

Putting the pieces together:

• With increased insulin resistance, your body is more likely to store fat rather than burn it. Higher insulin levels mean more fat storage, especially around the midsection.
• With a shift toward more visceral fat and less muscle, your metabolic rate drops, so even if you eat or move exactly as you always did, you may gain weight because your body’s baseline changed.
• The body’s redistribution of fat to the abdomen is particularly important because abdominal or visceral fat is more metabolically active, meaning it affects hormones, inflammation, and metabolism, further making weight loss harder.
• Sleep and stress matter too. Hot flashes, night sweats, poor sleep, and stress raise cortisol, and elevated cortisol promotes fat storage (especially around the belly) and worsens insulin resistance. (menopausenetwork.org)
• As a result, many women in this life stage say, “I’m doing what I always did, eating well and moving, but the scale goes up or won’t budge.” Science supports this.

The Role of Insulin, Blood Sugar, and Muscle Mass in This Process

Insulin and blood sugar:

• When insulin sensitivity drops, your body needs more insulin to manage the same amount of glucose. That higher insulin level means your body is more prone to fat storage rather than using glucose for fuel. (menopausenetwork.org)
• Frequent fluctuations in blood sugar (spikes and crashes) can trigger cravings, increased hunger, and more fat storage, especially around the belly.

Muscle mass:

• Each pound or kilogram of muscle uses more calories at rest than fat does, so losing muscle means burning fewer calories at rest.
• With less muscle, your body becomes less efficient at managing blood sugar and insulin since muscle is a major “sink” for glucose.
• Therefore, muscle loss equals slower metabolism and poorer insulin handling, creating an environment that favors weight gain or makes weight loss more difficult.

Emerging Research: Hormone Therapy and GLP-1 Medications May Work Better Together

Recent studies are exploring how combination approaches may help women in perimenopause and menopause who struggle with weight. One interesting finding is that women on both hormone therapy and GLP-1 agonists (a class of medications used for weight management and diabetes) appear to have greater weight-loss responses than those on GLP-1 medications alone.

A 2024 retrospective cohort study of postmenopausal women treated with the GLP-1 agonist Semaglutide found that those who were also on hormone therapy lost a higher percentage of their body weight across 3, 6, 9, and 12 months compared to those not on hormone therapy. (PubMed)

In addition, at the Endocrine Society annual meeting in 2025, researchers reported that women using hormone therapy plus the GLP-1/dual agonist Tirzepatide lost about 17 percent of body weight compared to about 14 percent for those without hormone therapy. Forty-five percent of the combination group achieved at least 20 percent weight loss compared to 18 percent for the non-hormone therapy group. (Drugs.com)

This suggests a synergy between the two treatments. Hormone therapy may enhance the metabolic and insulin sensitivity environment, making GLP-1 medications more effective in midlife women. These data are still emerging and larger randomized studies are needed, but they point to a promising path for women navigating weight and hormones in midlife.

What That Means for You and Your Journey

If you’re a woman in perimenopause or menopause and are frustrated by weight gain or an inability to lose weight, here’s how to think about it:

• It’s not just about calories in versus calories out. Your hormones, insulin sensitivity, muscle mass, fat distribution, and metabolism are all shifting, and that changes the rules.
• Lifestyle still matters. Strength training to preserve or build muscle, high-quality protein, good sleep, stress management, nutrient-dense whole foods, and reducing refined carbs and sugars all help mitigate many of the changes described above.
• Given the unique metabolic environment of perimenopause and menopause, some women may benefit from targeted medical support such as hormone therapy (if appropriate and under medical supervision) and advanced metabolic tools like GLP-1 medications.
• If you’ve followed a healthy lifestyle and still see minimal results, it may be time to work smarter, not harder, by considering how your body is changing hormonally.

Why Addressing This Stage Matters

Weight gain and increased visceral fat during midlife are not just cosmetic issues. They have real health implications, including higher risk of type 2 diabetes, cardiovascular disease, and liver fat accumulation. Getting ahead of these changes can help preserve long-term metabolic health, muscle strength, and vitality. (Mayo Clinic)

Ready for a Clearer Path Forward?

If you’re navigating perimenopause or menopause and want a tailored approach that addresses both hormone changes and metabolic shifts, we’re here to help. At Weight Loss NP, we offer both hormone optimization services and advanced metabolic care (including GLP-1 evaluation) designed for women in this life stage.
Learn more on our services page and schedule a consultation to explore what’s best for your body, your hormones, and your goals.

Research study reference:
Hurtado MD, Tama E, Fansa S et al. Weight loss response to semaglutide in postmenopausal women with and without hormone therapy use. Menopause. 2024;31(4):266-274. DOI:10.1097/GME.0000000000002310. (PubMed)